Preventing Spread of Diseases at Bird Feeders. 1  Clean feeders monthly using one part bleach to nine parts warm water. Soak the feeder in the solution for a few minutes, rinse, and air dry. 2  If uneaten food is accumulating in or under feeders, consider using less food or switch to a seed more to the birds' liking.
Isometrics are derived from Greek words-Isos { equal} + Metrikos { meaning measurement }. Isometrics are defined as a type of muscle contractions wherein the muscle develops tension without changing length. In the language of Exercise Science tension in the cross-bridges equals the resistance to shortening and the muscle length remains relatively constant.
Dynamic Tension. Dynamic Tension is the name Charles Atlas gave to the system of physical exercises that he first popularized in the 1920s. Dynamic Tension is a self-resistance exercise method which pits muscle against muscle. The practitioner tenses the muscles of a given body part and then moves the body part against the tension as if a heavy weight were being lifted. Dynamic Tension exercises are not merely isometrics, since they call for movement.